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Python | math.isqrt() method
• Last Updated : 04 Dec, 2020

Math module in Python contains a number of mathematical operations, which can be performed with ease using the module.
math.isqrt() method in Python is used to get the integer square root of the given non-negative integer value n. This method returns the floor value of the exact square root of n or equivalently the greatest integer a such that a2 <= n.

Note: This method is new in Python version 3.8.

Syntax: math.isqrt(n)

Parameter:
n: A non-negative integer

Returns: an integer value which represents the floor of exact square root of the given non-negative integer n.

Code #1: Use of math.isqrt() method

## Python3

 `# Python Program to explain``# math.isqrt() method`  `import` `math` `n ``=` `10` `# Get the floor value of``# exact square root of n``sqrt ``=` `math.isqrt(n)``print``(n)` `n ``=` `100` `# Get the floor value of``# exact square root of n``sqrt ``=` `math.isqrt(n)``print``(n)`
Output:
```3
10```

Code #2: Use of math.isqrt() method to check whether the given integer is a perfect square.

## Python3

 `# Python Program to explain``# math.isqrt() method`  `import` `math`  `def` `isPerfect(n):``    ` `    ``# Get the floor value of``    ``# exact square root of n``    ``sqrt ``=` `math.isqrt(n)``    ` `    ``if` `sqrt ``*` `sqrt ``=``=` `n:``        ``print``(f``"{n} is perfect square"``)``    ` `    ``else` `:``        ``print``(f``"{n} is not a perfect square"``)`   `# Driver's code``isPerfect(``100``)``isPerfect(``10``)`
Output:
```100 is perfect square
10 is not a perfect square```

Code #3: Use of math.isqrt() method to find the next perfect square of n.

## Python3

 `# Python Program to explain``# math.isqrt() method`  `import` `math` `n ``=` `11`  `def` `Next``(n):``    ` `    ``# Get the ceiling of``    ``# exact square root of n``    ``ceil ``=` `1` `+` `math.isqrt(n)``    ` `    ``# print the next perfect square of n``    ``print``(``"Next perfect square of {} is {}"``.``          ``format``(n, ceil``*``ceil))`  `# Driver's code``Next``(``11``)``Next``(``37``)`
Output:
```Next perfect square after 11 is 16
Next perfect square after 37 is 49```

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